<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en_US" lang="en_US">
<head>
<meta http-equiv="content-type" content="text/html; charset=UTF-8" />
<title>ChannelPipeline xref</title>
<link type="text/css" rel="stylesheet" href="../../../../stylesheet.css" />
</head>
<body>
<div id="overview"><a href="../../../../../api/org/jboss/netty/channel/ChannelPipeline.html">View Javadoc</a></div><pre>

<a class="jxr_linenumber" name="1" href="#1">1</a>   <em class="jxr_comment">/*</em>
<a class="jxr_linenumber" name="2" href="#2">2</a>   <em class="jxr_comment"> * Copyright 2012 The Netty Project</em>
<a class="jxr_linenumber" name="3" href="#3">3</a>   <em class="jxr_comment"> *</em>
<a class="jxr_linenumber" name="4" href="#4">4</a>   <em class="jxr_comment"> * The Netty Project licenses this file to you under the Apache License,</em>
<a class="jxr_linenumber" name="5" href="#5">5</a>   <em class="jxr_comment"> * version 2.0 (the "License"); you may not use this file except in compliance</em>
<a class="jxr_linenumber" name="6" href="#6">6</a>   <em class="jxr_comment"> * with the License. You may obtain a copy of the License at:</em>
<a class="jxr_linenumber" name="7" href="#7">7</a>   <em class="jxr_comment"> *</em>
<a class="jxr_linenumber" name="8" href="#8">8</a>   <em class="jxr_comment"> *   <a href="http://www.apache.org/licenses/LICENSE-2.0" target="alexandria_uri">http://www.apache.org/licenses/LICENSE-2.0</a></em>
<a class="jxr_linenumber" name="9" href="#9">9</a>   <em class="jxr_comment"> *</em>
<a class="jxr_linenumber" name="10" href="#10">10</a>  <em class="jxr_comment"> * Unless required by applicable law or agreed to in writing, software</em>
<a class="jxr_linenumber" name="11" href="#11">11</a>  <em class="jxr_comment"> * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT</em>
<a class="jxr_linenumber" name="12" href="#12">12</a>  <em class="jxr_comment"> * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the</em>
<a class="jxr_linenumber" name="13" href="#13">13</a>  <em class="jxr_comment"> * License for the specific language governing permissions and limitations</em>
<a class="jxr_linenumber" name="14" href="#14">14</a>  <em class="jxr_comment"> * under the License.</em>
<a class="jxr_linenumber" name="15" href="#15">15</a>  <em class="jxr_comment"> */</em>
<a class="jxr_linenumber" name="16" href="#16">16</a>  <strong class="jxr_keyword">package</strong> org.jboss.netty.channel;
<a class="jxr_linenumber" name="17" href="#17">17</a>  
<a class="jxr_linenumber" name="18" href="#18">18</a>  <strong class="jxr_keyword">import</strong> java.io.InputStream;
<a class="jxr_linenumber" name="19" href="#19">19</a>  <strong class="jxr_keyword">import</strong> java.io.OutputStream;
<a class="jxr_linenumber" name="20" href="#20">20</a>  <strong class="jxr_keyword">import</strong> java.util.List;
<a class="jxr_linenumber" name="21" href="#21">21</a>  <strong class="jxr_keyword">import</strong> java.util.Map;
<a class="jxr_linenumber" name="22" href="#22">22</a>  <strong class="jxr_keyword">import</strong> java.util.NoSuchElementException;
<a class="jxr_linenumber" name="23" href="#23">23</a>  
<a class="jxr_linenumber" name="24" href="#24">24</a>  <strong class="jxr_keyword">import</strong> org.jboss.netty.buffer.ChannelBuffer;
<a class="jxr_linenumber" name="25" href="#25">25</a>  <strong class="jxr_keyword">import</strong> org.jboss.netty.handler.execution.ExecutionHandler;
<a class="jxr_linenumber" name="26" href="#26">26</a>  <strong class="jxr_keyword">import</strong> org.jboss.netty.handler.execution.OrderedMemoryAwareThreadPoolExecutor;
<a class="jxr_linenumber" name="27" href="#27">27</a>  <strong class="jxr_keyword">import</strong> org.jboss.netty.handler.ssl.SslHandler;
<a class="jxr_linenumber" name="28" href="#28">28</a>  
<a class="jxr_linenumber" name="29" href="#29">29</a>  
<a class="jxr_linenumber" name="30" href="#30">30</a>  <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="31" href="#31">31</a>  <em class="jxr_javadoccomment"> * A list of {@link ChannelHandler}s which handles or intercepts</em>
<a class="jxr_linenumber" name="32" href="#32">32</a>  <em class="jxr_javadoccomment"> * {@link ChannelEvent}s of a {@link Channel}.  {@link ChannelPipeline}</em>
<a class="jxr_linenumber" name="33" href="#33">33</a>  <em class="jxr_javadoccomment"> * implements an advanced form of the</em>
<a class="jxr_linenumber" name="34" href="#34">34</a>  <em class="jxr_javadoccomment"> * &lt;a href="<a href="http://java.sun.com/blueprints/corej2eepatterns/Patterns/InterceptingFilter.html" target="alexandria_uri">http://java.sun.com/blueprints/corej2eepatterns/Patterns/InterceptingFilter.html</a>"&gt;Intercepting</em>
<a class="jxr_linenumber" name="35" href="#35">35</a>  <em class="jxr_javadoccomment"> * Filter&lt;/a&gt; pattern to give a user full control over how an event is handled</em>
<a class="jxr_linenumber" name="36" href="#36">36</a>  <em class="jxr_javadoccomment"> * and how the {@link ChannelHandler}s in the pipeline interact with each other.</em>
<a class="jxr_linenumber" name="37" href="#37">37</a>  <em class="jxr_javadoccomment"> *</em>
<a class="jxr_linenumber" name="38" href="#38">38</a>  <em class="jxr_javadoccomment"> * &lt;h3&gt;Creation of a pipeline&lt;/h3&gt;</em>
<a class="jxr_linenumber" name="39" href="#39">39</a>  <em class="jxr_javadoccomment"> *</em>
<a class="jxr_linenumber" name="40" href="#40">40</a>  <em class="jxr_javadoccomment"> * For each new channel, a new pipeline must be created and attached to the</em>
<a class="jxr_linenumber" name="41" href="#41">41</a>  <em class="jxr_javadoccomment"> * channel.  Once attached, the coupling between the channel and the pipeline</em>
<a class="jxr_linenumber" name="42" href="#42">42</a>  <em class="jxr_javadoccomment"> * is permanent; the channel cannot attach another pipeline to it nor detach</em>
<a class="jxr_linenumber" name="43" href="#43">43</a>  <em class="jxr_javadoccomment"> * the current pipeline from it.</em>
<a class="jxr_linenumber" name="44" href="#44">44</a>  <em class="jxr_javadoccomment"> * &lt;p&gt;</em>
<a class="jxr_linenumber" name="45" href="#45">45</a>  <em class="jxr_javadoccomment"> * The recommended way to create a new pipeline is to use the helper methods in</em>
<a class="jxr_linenumber" name="46" href="#46">46</a>  <em class="jxr_javadoccomment"> * {@link Channels} rather than calling an individual implementation's</em>
<a class="jxr_linenumber" name="47" href="#47">47</a>  <em class="jxr_javadoccomment"> * constructor:</em>
<a class="jxr_linenumber" name="48" href="#48">48</a>  <em class="jxr_javadoccomment"> * &lt;pre&gt;</em>
<a class="jxr_linenumber" name="49" href="#49">49</a>  <em class="jxr_javadoccomment"> * import static org.jboss.netty.channel.{@link Channels}.*;</em>
<a class="jxr_linenumber" name="50" href="#50">50</a>  <em class="jxr_javadoccomment"> * {@link ChannelPipeline} pipeline = pipeline(); // same with Channels.pipeline()</em>
<a class="jxr_linenumber" name="51" href="#51">51</a>  <em class="jxr_javadoccomment"> * &lt;/pre&gt;</em>
<a class="jxr_linenumber" name="52" href="#52">52</a>  <em class="jxr_javadoccomment"> *</em>
<a class="jxr_linenumber" name="53" href="#53">53</a>  <em class="jxr_javadoccomment"> * &lt;h3&gt;How an event flows in a pipeline&lt;/h3&gt;</em>
<a class="jxr_linenumber" name="54" href="#54">54</a>  <em class="jxr_javadoccomment"> *</em>
<a class="jxr_linenumber" name="55" href="#55">55</a>  <em class="jxr_javadoccomment"> * The following diagram describes how {@link ChannelEvent}s are processed by</em>
<a class="jxr_linenumber" name="56" href="#56">56</a>  <em class="jxr_javadoccomment"> * {@link ChannelHandler}s in a {@link ChannelPipeline} typically.</em>
<a class="jxr_linenumber" name="57" href="#57">57</a>  <em class="jxr_javadoccomment"> * A {@link ChannelEvent} can be handled by either a {@link ChannelUpstreamHandler}</em>
<a class="jxr_linenumber" name="58" href="#58">58</a>  <em class="jxr_javadoccomment"> * or a {@link ChannelDownstreamHandler} and be forwarded to the closest</em>
<a class="jxr_linenumber" name="59" href="#59">59</a>  <em class="jxr_javadoccomment"> * handler by calling {@link ChannelHandlerContext#sendUpstream(ChannelEvent)}</em>
<a class="jxr_linenumber" name="60" href="#60">60</a>  <em class="jxr_javadoccomment"> * or {@link ChannelHandlerContext#sendDownstream(ChannelEvent)}.  The meaning</em>
<a class="jxr_linenumber" name="61" href="#61">61</a>  <em class="jxr_javadoccomment"> * of the event is interpreted somewhat differently depending on whether it is</em>
<a class="jxr_linenumber" name="62" href="#62">62</a>  <em class="jxr_javadoccomment"> * going upstream or going downstream. Please refer to {@link ChannelEvent} for</em>
<a class="jxr_linenumber" name="63" href="#63">63</a>  <em class="jxr_javadoccomment"> * more information.</em>
<a class="jxr_linenumber" name="64" href="#64">64</a>  <em class="jxr_javadoccomment"> * &lt;pre&gt;</em>
<a class="jxr_linenumber" name="65" href="#65">65</a>  <em class="jxr_javadoccomment"> *                                       I/O Request</em>
<a class="jxr_linenumber" name="66" href="#66">66</a>  <em class="jxr_javadoccomment"> *                                     via {@link Channel} or</em>
<a class="jxr_linenumber" name="67" href="#67">67</a>  <em class="jxr_javadoccomment"> *                                 {@link ChannelHandlerContext}</em>
<a class="jxr_linenumber" name="68" href="#68">68</a>  <em class="jxr_javadoccomment"> *                                           |</em>
<a class="jxr_linenumber" name="69" href="#69">69</a>  <em class="jxr_javadoccomment"> *  +----------------------------------------+---------------+</em>
<a class="jxr_linenumber" name="70" href="#70">70</a>  <em class="jxr_javadoccomment"> *  |                  ChannelPipeline       |               |</em>
<a class="jxr_linenumber" name="71" href="#71">71</a>  <em class="jxr_javadoccomment"> *  |                                       \|/              |</em>
<a class="jxr_linenumber" name="72" href="#72">72</a>  <em class="jxr_javadoccomment"> *  |  +----------------------+  +-----------+------------+  |</em>
<a class="jxr_linenumber" name="73" href="#73">73</a>  <em class="jxr_javadoccomment"> *  |  | Upstream Handler  N  |  | Downstream Handler  1  |  |</em>
<a class="jxr_linenumber" name="74" href="#74">74</a>  <em class="jxr_javadoccomment"> *  |  +----------+-----------+  +-----------+------------+  |</em>
<a class="jxr_linenumber" name="75" href="#75">75</a>  <em class="jxr_javadoccomment"> *  |            /|\                         |               |</em>
<a class="jxr_linenumber" name="76" href="#76">76</a>  <em class="jxr_javadoccomment"> *  |             |                         \|/              |</em>
<a class="jxr_linenumber" name="77" href="#77">77</a>  <em class="jxr_javadoccomment"> *  |  +----------+-----------+  +-----------+------------+  |</em>
<a class="jxr_linenumber" name="78" href="#78">78</a>  <em class="jxr_javadoccomment"> *  |  | Upstream Handler N-1 |  | Downstream Handler  2  |  |</em>
<a class="jxr_linenumber" name="79" href="#79">79</a>  <em class="jxr_javadoccomment"> *  |  +----------+-----------+  +-----------+------------+  |</em>
<a class="jxr_linenumber" name="80" href="#80">80</a>  <em class="jxr_javadoccomment"> *  |            /|\                         .               |</em>
<a class="jxr_linenumber" name="81" href="#81">81</a>  <em class="jxr_javadoccomment"> *  |             .                          .               |</em>
<a class="jxr_linenumber" name="82" href="#82">82</a>  <em class="jxr_javadoccomment"> *  |     [ sendUpstream() ]        [ sendDownstream() ]     |</em>
<a class="jxr_linenumber" name="83" href="#83">83</a>  <em class="jxr_javadoccomment"> *  |     [ + INBOUND data ]        [ + OUTBOUND data  ]     |</em>
<a class="jxr_linenumber" name="84" href="#84">84</a>  <em class="jxr_javadoccomment"> *  |             .                          .               |</em>
<a class="jxr_linenumber" name="85" href="#85">85</a>  <em class="jxr_javadoccomment"> *  |             .                         \|/              |</em>
<a class="jxr_linenumber" name="86" href="#86">86</a>  <em class="jxr_javadoccomment"> *  |  +----------+-----------+  +-----------+------------+  |</em>
<a class="jxr_linenumber" name="87" href="#87">87</a>  <em class="jxr_javadoccomment"> *  |  | Upstream Handler  2  |  | Downstream Handler M-1 |  |</em>
<a class="jxr_linenumber" name="88" href="#88">88</a>  <em class="jxr_javadoccomment"> *  |  +----------+-----------+  +-----------+------------+  |</em>
<a class="jxr_linenumber" name="89" href="#89">89</a>  <em class="jxr_javadoccomment"> *  |            /|\                         |               |</em>
<a class="jxr_linenumber" name="90" href="#90">90</a>  <em class="jxr_javadoccomment"> *  |             |                         \|/              |</em>
<a class="jxr_linenumber" name="91" href="#91">91</a>  <em class="jxr_javadoccomment"> *  |  +----------+-----------+  +-----------+------------+  |</em>
<a class="jxr_linenumber" name="92" href="#92">92</a>  <em class="jxr_javadoccomment"> *  |  | Upstream Handler  1  |  | Downstream Handler  M  |  |</em>
<a class="jxr_linenumber" name="93" href="#93">93</a>  <em class="jxr_javadoccomment"> *  |  +----------+-----------+  +-----------+------------+  |</em>
<a class="jxr_linenumber" name="94" href="#94">94</a>  <em class="jxr_javadoccomment"> *  |            /|\                         |               |</em>
<a class="jxr_linenumber" name="95" href="#95">95</a>  <em class="jxr_javadoccomment"> *  +-------------+--------------------------+---------------+</em>
<a class="jxr_linenumber" name="96" href="#96">96</a>  <em class="jxr_javadoccomment"> *                |                         \|/</em>
<a class="jxr_linenumber" name="97" href="#97">97</a>  <em class="jxr_javadoccomment"> *  +-------------+--------------------------+---------------+</em>
<a class="jxr_linenumber" name="98" href="#98">98</a>  <em class="jxr_javadoccomment"> *  |             |                          |               |</em>
<a class="jxr_linenumber" name="99" href="#99">99</a>  <em class="jxr_javadoccomment"> *  |     [ Socket.read() ]          [ Socket.write() ]      |</em>
<a class="jxr_linenumber" name="100" href="#100">100</a> <em class="jxr_javadoccomment"> *  |                                                        |</em>
<a class="jxr_linenumber" name="101" href="#101">101</a> <em class="jxr_javadoccomment"> *  |  Netty Internal I/O Threads (Transport Implementation) |</em>
<a class="jxr_linenumber" name="102" href="#102">102</a> <em class="jxr_javadoccomment"> *  +--------------------------------------------------------+</em>
<a class="jxr_linenumber" name="103" href="#103">103</a> <em class="jxr_javadoccomment"> * &lt;/pre&gt;</em>
<a class="jxr_linenumber" name="104" href="#104">104</a> <em class="jxr_javadoccomment"> * An upstream event is handled by the upstream handlers in the bottom-up</em>
<a class="jxr_linenumber" name="105" href="#105">105</a> <em class="jxr_javadoccomment"> * direction as shown on the left side of the diagram.  An upstream handler</em>
<a class="jxr_linenumber" name="106" href="#106">106</a> <em class="jxr_javadoccomment"> * usually handles the inbound data generated by the I/O thread on the bottom</em>
<a class="jxr_linenumber" name="107" href="#107">107</a> <em class="jxr_javadoccomment"> * of the diagram.  The inbound data is often read from a remote peer via the</em>
<a class="jxr_linenumber" name="108" href="#108">108</a> <em class="jxr_javadoccomment"> * actual input operation such as {@link InputStream#read(byte[])}.</em>
<a class="jxr_linenumber" name="109" href="#109">109</a> <em class="jxr_javadoccomment"> * If an upstream event goes beyond the top upstream handler, it is discarded</em>
<a class="jxr_linenumber" name="110" href="#110">110</a> <em class="jxr_javadoccomment"> * silently.</em>
<a class="jxr_linenumber" name="111" href="#111">111</a> <em class="jxr_javadoccomment"> * &lt;p&gt;</em>
<a class="jxr_linenumber" name="112" href="#112">112</a> <em class="jxr_javadoccomment"> * A downstream event is handled by the downstream handler in the top-down</em>
<a class="jxr_linenumber" name="113" href="#113">113</a> <em class="jxr_javadoccomment"> * direction as shown on the right side of the diagram.  A downstream handler</em>
<a class="jxr_linenumber" name="114" href="#114">114</a> <em class="jxr_javadoccomment"> * usually generates or transforms the outbound traffic such as write requests.</em>
<a class="jxr_linenumber" name="115" href="#115">115</a> <em class="jxr_javadoccomment"> * If a downstream event goes beyond the bottom downstream handler, it is</em>
<a class="jxr_linenumber" name="116" href="#116">116</a> <em class="jxr_javadoccomment"> * handled by an I/O thread associated with the {@link Channel}. The I/O thread</em>
<a class="jxr_linenumber" name="117" href="#117">117</a> <em class="jxr_javadoccomment"> * often performs the actual output operation such as {@link OutputStream#write(byte[])}.</em>
<a class="jxr_linenumber" name="118" href="#118">118</a> <em class="jxr_javadoccomment"> * &lt;p&gt;</em>
<a class="jxr_linenumber" name="119" href="#119">119</a> <em class="jxr_javadoccomment"> * For example, let us assume that we created the following pipeline:</em>
<a class="jxr_linenumber" name="120" href="#120">120</a> <em class="jxr_javadoccomment"> * &lt;pre&gt;</em>
<a class="jxr_linenumber" name="121" href="#121">121</a> <em class="jxr_javadoccomment"> * {@link ChannelPipeline} p = {@link Channels}.pipeline();</em>
<a class="jxr_linenumber" name="122" href="#122">122</a> <em class="jxr_javadoccomment"> * p.addLast("1", new UpstreamHandlerA());</em>
<a class="jxr_linenumber" name="123" href="#123">123</a> <em class="jxr_javadoccomment"> * p.addLast("2", new UpstreamHandlerB());</em>
<a class="jxr_linenumber" name="124" href="#124">124</a> <em class="jxr_javadoccomment"> * p.addLast("3", new DownstreamHandlerA());</em>
<a class="jxr_linenumber" name="125" href="#125">125</a> <em class="jxr_javadoccomment"> * p.addLast("4", new DownstreamHandlerB());</em>
<a class="jxr_linenumber" name="126" href="#126">126</a> <em class="jxr_javadoccomment"> * p.addLast("5", new UpstreamHandlerX());</em>
<a class="jxr_linenumber" name="127" href="#127">127</a> <em class="jxr_javadoccomment"> * &lt;/pre&gt;</em>
<a class="jxr_linenumber" name="128" href="#128">128</a> <em class="jxr_javadoccomment"> * In the example above, the class whose name starts with {@code Upstream} means</em>
<a class="jxr_linenumber" name="129" href="#129">129</a> <em class="jxr_javadoccomment"> * it is an upstream handler.  The class whose name starts with</em>
<a class="jxr_linenumber" name="130" href="#130">130</a> <em class="jxr_javadoccomment"> * {@code Downstream} means it is a downstream handler.</em>
<a class="jxr_linenumber" name="131" href="#131">131</a> <em class="jxr_javadoccomment"> * &lt;p&gt;</em>
<a class="jxr_linenumber" name="132" href="#132">132</a> <em class="jxr_javadoccomment"> * In the given example configuration, the handler evaluation order is 1, 2, 3,</em>
<a class="jxr_linenumber" name="133" href="#133">133</a> <em class="jxr_javadoccomment"> * 4, 5 when an event goes upstream.  When an event goes downstream, the order</em>
<a class="jxr_linenumber" name="134" href="#134">134</a> <em class="jxr_javadoccomment"> * is 5, 4, 3, 2, 1.  On top of this principle, {@link ChannelPipeline} skips</em>
<a class="jxr_linenumber" name="135" href="#135">135</a> <em class="jxr_javadoccomment"> * the evaluation of certain handlers to shorten the stack depth:</em>
<a class="jxr_linenumber" name="136" href="#136">136</a> <em class="jxr_javadoccomment"> * &lt;ul&gt;</em>
<a class="jxr_linenumber" name="137" href="#137">137</a> <em class="jxr_javadoccomment"> * &lt;li&gt;3 and 4 don't implement {@link ChannelUpstreamHandler}, and therefore the</em>
<a class="jxr_linenumber" name="138" href="#138">138</a> <em class="jxr_javadoccomment"> *     actual evaluation order of an upstream event will be: 1, 2, and 5.&lt;/li&gt;</em>
<a class="jxr_linenumber" name="139" href="#139">139</a> <em class="jxr_javadoccomment"> * &lt;li&gt;1, 2, and 5 don't implement {@link ChannelDownstreamHandler}, and</em>
<a class="jxr_linenumber" name="140" href="#140">140</a> <em class="jxr_javadoccomment"> *     therefore the actual evaluation order of a downstream event will be:</em>
<a class="jxr_linenumber" name="141" href="#141">141</a> <em class="jxr_javadoccomment"> *     4 and 3.&lt;/li&gt;</em>
<a class="jxr_linenumber" name="142" href="#142">142</a> <em class="jxr_javadoccomment"> * &lt;li&gt;If 5 extended {@link SimpleChannelHandler} which implements both</em>
<a class="jxr_linenumber" name="143" href="#143">143</a> <em class="jxr_javadoccomment"> *     {@link ChannelUpstreamHandler} and {@link ChannelDownstreamHandler}, the</em>
<a class="jxr_linenumber" name="144" href="#144">144</a> <em class="jxr_javadoccomment"> *     evaluation order of an upstream and a downstream event could be 125 and</em>
<a class="jxr_linenumber" name="145" href="#145">145</a> <em class="jxr_javadoccomment"> *     543 respectively.&lt;/li&gt;</em>
<a class="jxr_linenumber" name="146" href="#146">146</a> <em class="jxr_javadoccomment"> * &lt;/ul&gt;</em>
<a class="jxr_linenumber" name="147" href="#147">147</a> <em class="jxr_javadoccomment"> *</em>
<a class="jxr_linenumber" name="148" href="#148">148</a> <em class="jxr_javadoccomment"> * &lt;h3&gt;Building a pipeline&lt;/h3&gt;</em>
<a class="jxr_linenumber" name="149" href="#149">149</a> <em class="jxr_javadoccomment"> * &lt;p&gt;</em>
<a class="jxr_linenumber" name="150" href="#150">150</a> <em class="jxr_javadoccomment"> * A user is supposed to have one or more {@link ChannelHandler}s in a</em>
<a class="jxr_linenumber" name="151" href="#151">151</a> <em class="jxr_javadoccomment"> * pipeline to receive I/O events (e.g. read) and to request I/O operations</em>
<a class="jxr_linenumber" name="152" href="#152">152</a> <em class="jxr_javadoccomment"> * (e.g. write and close).  For example, a typical server will have the following</em>
<a class="jxr_linenumber" name="153" href="#153">153</a> <em class="jxr_javadoccomment"> * handlers in each channel's pipeline, but your mileage may vary depending on</em>
<a class="jxr_linenumber" name="154" href="#154">154</a> <em class="jxr_javadoccomment"> * the complexity and characteristics of the protocol and business logic:</em>
<a class="jxr_linenumber" name="155" href="#155">155</a> <em class="jxr_javadoccomment"> *</em>
<a class="jxr_linenumber" name="156" href="#156">156</a> <em class="jxr_javadoccomment"> * &lt;ol&gt;</em>
<a class="jxr_linenumber" name="157" href="#157">157</a> <em class="jxr_javadoccomment"> * &lt;li&gt;Protocol Decoder - translates binary data (e.g. {@link ChannelBuffer})</em>
<a class="jxr_linenumber" name="158" href="#158">158</a> <em class="jxr_javadoccomment"> *                        into a Java object.&lt;/li&gt;</em>
<a class="jxr_linenumber" name="159" href="#159">159</a> <em class="jxr_javadoccomment"> * &lt;li&gt;Protocol Encoder - translates a Java object into binary data.&lt;/li&gt;</em>
<a class="jxr_linenumber" name="160" href="#160">160</a> <em class="jxr_javadoccomment"> * &lt;li&gt;{@link ExecutionHandler} - applies a thread model.&lt;/li&gt;</em>
<a class="jxr_linenumber" name="161" href="#161">161</a> <em class="jxr_javadoccomment"> * &lt;li&gt;Business Logic Handler - performs the actual business logic</em>
<a class="jxr_linenumber" name="162" href="#162">162</a> <em class="jxr_javadoccomment"> *                              (e.g. database access).&lt;/li&gt;</em>
<a class="jxr_linenumber" name="163" href="#163">163</a> <em class="jxr_javadoccomment"> * &lt;/ol&gt;</em>
<a class="jxr_linenumber" name="164" href="#164">164</a> <em class="jxr_javadoccomment"> *</em>
<a class="jxr_linenumber" name="165" href="#165">165</a> <em class="jxr_javadoccomment"> * and it could be represented as shown in the following example:</em>
<a class="jxr_linenumber" name="166" href="#166">166</a> <em class="jxr_javadoccomment"> *</em>
<a class="jxr_linenumber" name="167" href="#167">167</a> <em class="jxr_javadoccomment"> * &lt;pre&gt;</em>
<a class="jxr_linenumber" name="168" href="#168">168</a> <em class="jxr_javadoccomment"> * {@link ChannelPipeline} pipeline = {@link Channels#pipeline() Channels.pipeline()};</em>
<a class="jxr_linenumber" name="169" href="#169">169</a> <em class="jxr_javadoccomment"> * pipeline.addLast("decoder", new MyProtocolDecoder());</em>
<a class="jxr_linenumber" name="170" href="#170">170</a> <em class="jxr_javadoccomment"> * pipeline.addLast("encoder", new MyProtocolEncoder());</em>
<a class="jxr_linenumber" name="171" href="#171">171</a> <em class="jxr_javadoccomment"> * pipeline.addLast("executor", new {@link ExecutionHandler}(</em>
<a class="jxr_linenumber" name="172" href="#172">172</a> <em class="jxr_javadoccomment"> *         new {@link OrderedMemoryAwareThreadPoolExecutor}(16, 1048576, 1048576)));</em>
<a class="jxr_linenumber" name="173" href="#173">173</a> <em class="jxr_javadoccomment"> * pipeline.addLast("handler", new MyBusinessLogicHandler());</em>
<a class="jxr_linenumber" name="174" href="#174">174</a> <em class="jxr_javadoccomment"> * &lt;/pre&gt;</em>
<a class="jxr_linenumber" name="175" href="#175">175</a> <em class="jxr_javadoccomment"> *</em>
<a class="jxr_linenumber" name="176" href="#176">176</a> <em class="jxr_javadoccomment"> * &lt;h3&gt;Thread safety&lt;/h3&gt;</em>
<a class="jxr_linenumber" name="177" href="#177">177</a> <em class="jxr_javadoccomment"> * &lt;p&gt;</em>
<a class="jxr_linenumber" name="178" href="#178">178</a> <em class="jxr_javadoccomment"> * A {@link ChannelHandler} can be added or removed at any time because a</em>
<a class="jxr_linenumber" name="179" href="#179">179</a> <em class="jxr_javadoccomment"> * {@link ChannelPipeline} is thread safe.  For example, you can insert a</em>
<a class="jxr_linenumber" name="180" href="#180">180</a> <em class="jxr_javadoccomment"> * {@link SslHandler} when sensitive information is about to be exchanged,</em>
<a class="jxr_linenumber" name="181" href="#181">181</a> <em class="jxr_javadoccomment"> * and remove it after the exchange.</em>
<a class="jxr_linenumber" name="182" href="#182">182</a> <em class="jxr_javadoccomment"> *</em>
<a class="jxr_linenumber" name="183" href="#183">183</a> <em class="jxr_javadoccomment"> * &lt;h3&gt;Pitfall&lt;/h3&gt;</em>
<a class="jxr_linenumber" name="184" href="#184">184</a> <em class="jxr_javadoccomment"> * &lt;p&gt;</em>
<a class="jxr_linenumber" name="185" href="#185">185</a> <em class="jxr_javadoccomment"> * Due to the internal implementation detail of the current default</em>
<a class="jxr_linenumber" name="186" href="#186">186</a> <em class="jxr_javadoccomment"> * {@link ChannelPipeline}, the following code does not work as expected if</em>
<a class="jxr_linenumber" name="187" href="#187">187</a> <em class="jxr_javadoccomment"> * &lt;tt&gt;FirstHandler&lt;/tt&gt; is the last handler in the pipeline:</em>
<a class="jxr_linenumber" name="188" href="#188">188</a> <em class="jxr_javadoccomment"> * &lt;pre&gt;</em>
<a class="jxr_linenumber" name="189" href="#189">189</a> <em class="jxr_javadoccomment"> * public class FirstHandler extends {@link SimpleChannelUpstreamHandler} {</em>
<a class="jxr_linenumber" name="190" href="#190">190</a> <em class="jxr_javadoccomment"> *</em>
<a class="jxr_linenumber" name="191" href="#191">191</a> <em class="jxr_javadoccomment"> *     {@code @Override}</em>
<a class="jxr_linenumber" name="192" href="#192">192</a> <em class="jxr_javadoccomment"> *     public void messageReceived({@link ChannelHandlerContext} ctx, {@link MessageEvent} e) {</em>
<a class="jxr_linenumber" name="193" href="#193">193</a> <em class="jxr_javadoccomment"> *         // Remove this handler from the pipeline,</em>
<a class="jxr_linenumber" name="194" href="#194">194</a> <em class="jxr_javadoccomment"> *         ctx.getPipeline().remove(this);</em>
<a class="jxr_linenumber" name="195" href="#195">195</a> <em class="jxr_javadoccomment"> *         // And let SecondHandler handle the current event.</em>
<a class="jxr_linenumber" name="196" href="#196">196</a> <em class="jxr_javadoccomment"> *         ctx.getPipeline().addLast("2nd", new SecondHandler());</em>
<a class="jxr_linenumber" name="197" href="#197">197</a> <em class="jxr_javadoccomment"> *         ctx.sendUpstream(e);</em>
<a class="jxr_linenumber" name="198" href="#198">198</a> <em class="jxr_javadoccomment"> *     }</em>
<a class="jxr_linenumber" name="199" href="#199">199</a> <em class="jxr_javadoccomment"> * }</em>
<a class="jxr_linenumber" name="200" href="#200">200</a> <em class="jxr_javadoccomment"> * &lt;/pre&gt;</em>
<a class="jxr_linenumber" name="201" href="#201">201</a> <em class="jxr_javadoccomment"> * To implement the expected behavior, you have to add &lt;tt&gt;SecondHandler&lt;/tt&gt;</em>
<a class="jxr_linenumber" name="202" href="#202">202</a> <em class="jxr_javadoccomment"> * before the removal or make sure there is at least one more handler between</em>
<a class="jxr_linenumber" name="203" href="#203">203</a> <em class="jxr_javadoccomment"> * &lt;tt&gt;FirstHandler&lt;/tt&gt; and &lt;tt&gt;SecondHandler&lt;/tt&gt;.</em>
<a class="jxr_linenumber" name="204" href="#204">204</a> <em class="jxr_javadoccomment"> *</em>
<a class="jxr_linenumber" name="205" href="#205">205</a> <em class="jxr_javadoccomment"> * @apiviz.landmark</em>
<a class="jxr_linenumber" name="206" href="#206">206</a> <em class="jxr_javadoccomment"> * @apiviz.composedOf org.jboss.netty.channel.ChannelHandlerContext</em>
<a class="jxr_linenumber" name="207" href="#207">207</a> <em class="jxr_javadoccomment"> * @apiviz.owns       org.jboss.netty.channel.ChannelHandler</em>
<a class="jxr_linenumber" name="208" href="#208">208</a> <em class="jxr_javadoccomment"> * @apiviz.uses       org.jboss.netty.channel.ChannelSink - - sends events downstream</em>
<a class="jxr_linenumber" name="209" href="#209">209</a> <em class="jxr_javadoccomment"> */</em>
<a class="jxr_linenumber" name="210" href="#210">210</a> <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">interface</strong> <a href="../../../../org/jboss/netty/channel/ChannelPipeline.html">ChannelPipeline</a> {
<a class="jxr_linenumber" name="211" href="#211">211</a> 
<a class="jxr_linenumber" name="212" href="#212">212</a>     <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="213" href="#213">213</a> <em class="jxr_javadoccomment">     * Inserts a {@link ChannelHandler} at the first position of this pipeline.</em>
<a class="jxr_linenumber" name="214" href="#214">214</a> <em class="jxr_javadoccomment">     *</em>
<a class="jxr_linenumber" name="215" href="#215">215</a> <em class="jxr_javadoccomment">     * @param name     the name of the handler to insert first</em>
<a class="jxr_linenumber" name="216" href="#216">216</a> <em class="jxr_javadoccomment">     * @param handler  the handler to insert first</em>
<a class="jxr_linenumber" name="217" href="#217">217</a> <em class="jxr_javadoccomment">     *</em>
<a class="jxr_linenumber" name="218" href="#218">218</a> <em class="jxr_javadoccomment">     * @throws IllegalArgumentException</em>
<a class="jxr_linenumber" name="219" href="#219">219</a> <em class="jxr_javadoccomment">     *         if there's an entry with the same name already in the pipeline</em>
<a class="jxr_linenumber" name="220" href="#220">220</a> <em class="jxr_javadoccomment">     * @throws NullPointerException</em>
<a class="jxr_linenumber" name="221" href="#221">221</a> <em class="jxr_javadoccomment">     *         if the specified name or handler is {@code null}</em>
<a class="jxr_linenumber" name="222" href="#222">222</a> <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="223" href="#223">223</a>     <strong class="jxr_keyword">void</strong> addFirst(String name, <a href="../../../../org/jboss/netty/channel/ChannelHandler.html">ChannelHandler</a> handler);
<a class="jxr_linenumber" name="224" href="#224">224</a> 
<a class="jxr_linenumber" name="225" href="#225">225</a>     <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="226" href="#226">226</a> <em class="jxr_javadoccomment">     * Appends a {@link ChannelHandler} at the last position of this pipeline.</em>
<a class="jxr_linenumber" name="227" href="#227">227</a> <em class="jxr_javadoccomment">     *</em>
<a class="jxr_linenumber" name="228" href="#228">228</a> <em class="jxr_javadoccomment">     * @param name     the name of the handler to append</em>
<a class="jxr_linenumber" name="229" href="#229">229</a> <em class="jxr_javadoccomment">     * @param handler  the handler to append</em>
<a class="jxr_linenumber" name="230" href="#230">230</a> <em class="jxr_javadoccomment">     *</em>
<a class="jxr_linenumber" name="231" href="#231">231</a> <em class="jxr_javadoccomment">     * @throws IllegalArgumentException</em>
<a class="jxr_linenumber" name="232" href="#232">232</a> <em class="jxr_javadoccomment">     *         if there's an entry with the same name already in the pipeline</em>
<a class="jxr_linenumber" name="233" href="#233">233</a> <em class="jxr_javadoccomment">     * @throws NullPointerException</em>
<a class="jxr_linenumber" name="234" href="#234">234</a> <em class="jxr_javadoccomment">     *         if the specified name or handler is {@code null}</em>
<a class="jxr_linenumber" name="235" href="#235">235</a> <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="236" href="#236">236</a>     <strong class="jxr_keyword">void</strong> addLast(String name, <a href="../../../../org/jboss/netty/channel/ChannelHandler.html">ChannelHandler</a> handler);
<a class="jxr_linenumber" name="237" href="#237">237</a> 
<a class="jxr_linenumber" name="238" href="#238">238</a>     <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="239" href="#239">239</a> <em class="jxr_javadoccomment">     * Inserts a {@link ChannelHandler} before an existing handler of this</em>
<a class="jxr_linenumber" name="240" href="#240">240</a> <em class="jxr_javadoccomment">     * pipeline.</em>
<a class="jxr_linenumber" name="241" href="#241">241</a> <em class="jxr_javadoccomment">     *</em>
<a class="jxr_linenumber" name="242" href="#242">242</a> <em class="jxr_javadoccomment">     * @param baseName  the name of the existing handler</em>
<a class="jxr_linenumber" name="243" href="#243">243</a> <em class="jxr_javadoccomment">     * @param name      the name of the handler to insert before</em>
<a class="jxr_linenumber" name="244" href="#244">244</a> <em class="jxr_javadoccomment">     * @param handler   the handler to insert before</em>
<a class="jxr_linenumber" name="245" href="#245">245</a> <em class="jxr_javadoccomment">     *</em>
<a class="jxr_linenumber" name="246" href="#246">246</a> <em class="jxr_javadoccomment">     * @throws NoSuchElementException</em>
<a class="jxr_linenumber" name="247" href="#247">247</a> <em class="jxr_javadoccomment">     *         if there's no such entry with the specified {@code baseName}</em>
<a class="jxr_linenumber" name="248" href="#248">248</a> <em class="jxr_javadoccomment">     * @throws IllegalArgumentException</em>
<a class="jxr_linenumber" name="249" href="#249">249</a> <em class="jxr_javadoccomment">     *         if there's an entry with the same name already in the pipeline</em>
<a class="jxr_linenumber" name="250" href="#250">250</a> <em class="jxr_javadoccomment">     * @throws NullPointerException</em>
<a class="jxr_linenumber" name="251" href="#251">251</a> <em class="jxr_javadoccomment">     *         if the specified baseName, name, or handler is {@code null}</em>
<a class="jxr_linenumber" name="252" href="#252">252</a> <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="253" href="#253">253</a>     <strong class="jxr_keyword">void</strong> addBefore(String baseName, String name, <a href="../../../../org/jboss/netty/channel/ChannelHandler.html">ChannelHandler</a> handler);
<a class="jxr_linenumber" name="254" href="#254">254</a> 
<a class="jxr_linenumber" name="255" href="#255">255</a>     <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="256" href="#256">256</a> <em class="jxr_javadoccomment">     * Inserts a {@link ChannelHandler} after an existing handler of this</em>
<a class="jxr_linenumber" name="257" href="#257">257</a> <em class="jxr_javadoccomment">     * pipeline.</em>
<a class="jxr_linenumber" name="258" href="#258">258</a> <em class="jxr_javadoccomment">     *</em>
<a class="jxr_linenumber" name="259" href="#259">259</a> <em class="jxr_javadoccomment">     * @param baseName  the name of the existing handler</em>
<a class="jxr_linenumber" name="260" href="#260">260</a> <em class="jxr_javadoccomment">     * @param name      the name of the handler to insert after</em>
<a class="jxr_linenumber" name="261" href="#261">261</a> <em class="jxr_javadoccomment">     * @param handler   the handler to insert after</em>
<a class="jxr_linenumber" name="262" href="#262">262</a> <em class="jxr_javadoccomment">     *</em>
<a class="jxr_linenumber" name="263" href="#263">263</a> <em class="jxr_javadoccomment">     * @throws NoSuchElementException</em>
<a class="jxr_linenumber" name="264" href="#264">264</a> <em class="jxr_javadoccomment">     *         if there's no such entry with the specified {@code baseName}</em>
<a class="jxr_linenumber" name="265" href="#265">265</a> <em class="jxr_javadoccomment">     * @throws IllegalArgumentException</em>
<a class="jxr_linenumber" name="266" href="#266">266</a> <em class="jxr_javadoccomment">     *         if there's an entry with the same name already in the pipeline</em>
<a class="jxr_linenumber" name="267" href="#267">267</a> <em class="jxr_javadoccomment">     * @throws NullPointerException</em>
<a class="jxr_linenumber" name="268" href="#268">268</a> <em class="jxr_javadoccomment">     *         if the specified baseName, name, or handler is {@code null}</em>
<a class="jxr_linenumber" name="269" href="#269">269</a> <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="270" href="#270">270</a>     <strong class="jxr_keyword">void</strong> addAfter(String baseName, String name, <a href="../../../../org/jboss/netty/channel/ChannelHandler.html">ChannelHandler</a> handler);
<a class="jxr_linenumber" name="271" href="#271">271</a> 
<a class="jxr_linenumber" name="272" href="#272">272</a>     <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="273" href="#273">273</a> <em class="jxr_javadoccomment">     * Removes the specified {@link ChannelHandler} from this pipeline.</em>
<a class="jxr_linenumber" name="274" href="#274">274</a> <em class="jxr_javadoccomment">     *</em>
<a class="jxr_linenumber" name="275" href="#275">275</a> <em class="jxr_javadoccomment">     * @throws NoSuchElementException</em>
<a class="jxr_linenumber" name="276" href="#276">276</a> <em class="jxr_javadoccomment">     *         if there's no such handler in this pipeline</em>
<a class="jxr_linenumber" name="277" href="#277">277</a> <em class="jxr_javadoccomment">     * @throws NullPointerException</em>
<a class="jxr_linenumber" name="278" href="#278">278</a> <em class="jxr_javadoccomment">     *         if the specified handler is {@code null}</em>
<a class="jxr_linenumber" name="279" href="#279">279</a> <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="280" href="#280">280</a>     <strong class="jxr_keyword">void</strong> remove(<a href="../../../../org/jboss/netty/channel/ChannelHandler.html">ChannelHandler</a> handler);
<a class="jxr_linenumber" name="281" href="#281">281</a> 
<a class="jxr_linenumber" name="282" href="#282">282</a>     <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="283" href="#283">283</a> <em class="jxr_javadoccomment">     * Removes the {@link ChannelHandler} with the specified name from this</em>
<a class="jxr_linenumber" name="284" href="#284">284</a> <em class="jxr_javadoccomment">     * pipeline.</em>
<a class="jxr_linenumber" name="285" href="#285">285</a> <em class="jxr_javadoccomment">     *</em>
<a class="jxr_linenumber" name="286" href="#286">286</a> <em class="jxr_javadoccomment">     * @return the removed handler</em>
<a class="jxr_linenumber" name="287" href="#287">287</a> <em class="jxr_javadoccomment">     *</em>
<a class="jxr_linenumber" name="288" href="#288">288</a> <em class="jxr_javadoccomment">     * @throws NoSuchElementException</em>
<a class="jxr_linenumber" name="289" href="#289">289</a> <em class="jxr_javadoccomment">     *         if there's no such handler with the specified name in this pipeline</em>
<a class="jxr_linenumber" name="290" href="#290">290</a> <em class="jxr_javadoccomment">     * @throws NullPointerException</em>
<a class="jxr_linenumber" name="291" href="#291">291</a> <em class="jxr_javadoccomment">     *         if the specified name is {@code null}</em>
<a class="jxr_linenumber" name="292" href="#292">292</a> <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="293" href="#293">293</a>     <a href="../../../../org/jboss/netty/channel/ChannelHandler.html">ChannelHandler</a> remove(String name);
<a class="jxr_linenumber" name="294" href="#294">294</a> 
<a class="jxr_linenumber" name="295" href="#295">295</a>     <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="296" href="#296">296</a> <em class="jxr_javadoccomment">     * Removes the {@link ChannelHandler} of the specified type from this</em>
<a class="jxr_linenumber" name="297" href="#297">297</a> <em class="jxr_javadoccomment">     * pipeline</em>
<a class="jxr_linenumber" name="298" href="#298">298</a> <em class="jxr_javadoccomment">     *</em>
<a class="jxr_linenumber" name="299" href="#299">299</a> <em class="jxr_javadoccomment">     * @param &lt;T&gt;          the type of the handler</em>
<a class="jxr_linenumber" name="300" href="#300">300</a> <em class="jxr_javadoccomment">     * @param handlerType  the type of the handler</em>
<a class="jxr_linenumber" name="301" href="#301">301</a> <em class="jxr_javadoccomment">     *</em>
<a class="jxr_linenumber" name="302" href="#302">302</a> <em class="jxr_javadoccomment">     * @return the removed handler</em>
<a class="jxr_linenumber" name="303" href="#303">303</a> <em class="jxr_javadoccomment">     *</em>
<a class="jxr_linenumber" name="304" href="#304">304</a> <em class="jxr_javadoccomment">     * @throws NoSuchElementException</em>
<a class="jxr_linenumber" name="305" href="#305">305</a> <em class="jxr_javadoccomment">     *         if there's no such handler of the specified type in this pipeline</em>
<a class="jxr_linenumber" name="306" href="#306">306</a> <em class="jxr_javadoccomment">     * @throws NullPointerException</em>
<a class="jxr_linenumber" name="307" href="#307">307</a> <em class="jxr_javadoccomment">     *         if the specified handler type is {@code null}</em>
<a class="jxr_linenumber" name="308" href="#308">308</a> <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="309" href="#309">309</a>     &lt;T <strong class="jxr_keyword">extends</strong> ChannelHandler&gt; T remove(Class&lt;T&gt; handlerType);
<a class="jxr_linenumber" name="310" href="#310">310</a> 
<a class="jxr_linenumber" name="311" href="#311">311</a>     <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="312" href="#312">312</a> <em class="jxr_javadoccomment">     * Removes the first {@link ChannelHandler} in this pipeline.</em>
<a class="jxr_linenumber" name="313" href="#313">313</a> <em class="jxr_javadoccomment">     *</em>
<a class="jxr_linenumber" name="314" href="#314">314</a> <em class="jxr_javadoccomment">     * @return the removed handler</em>
<a class="jxr_linenumber" name="315" href="#315">315</a> <em class="jxr_javadoccomment">     *</em>
<a class="jxr_linenumber" name="316" href="#316">316</a> <em class="jxr_javadoccomment">     * @throws NoSuchElementException</em>
<a class="jxr_linenumber" name="317" href="#317">317</a> <em class="jxr_javadoccomment">     *         if this pipeline is empty</em>
<a class="jxr_linenumber" name="318" href="#318">318</a> <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="319" href="#319">319</a>     <a href="../../../../org/jboss/netty/channel/ChannelHandler.html">ChannelHandler</a> removeFirst();
<a class="jxr_linenumber" name="320" href="#320">320</a> 
<a class="jxr_linenumber" name="321" href="#321">321</a>     <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="322" href="#322">322</a> <em class="jxr_javadoccomment">     * Removes the last {@link ChannelHandler} in this pipeline.</em>
<a class="jxr_linenumber" name="323" href="#323">323</a> <em class="jxr_javadoccomment">     *</em>
<a class="jxr_linenumber" name="324" href="#324">324</a> <em class="jxr_javadoccomment">     * @return the removed handler</em>
<a class="jxr_linenumber" name="325" href="#325">325</a> <em class="jxr_javadoccomment">     *</em>
<a class="jxr_linenumber" name="326" href="#326">326</a> <em class="jxr_javadoccomment">     * @throws NoSuchElementException</em>
<a class="jxr_linenumber" name="327" href="#327">327</a> <em class="jxr_javadoccomment">     *         if this pipeline is empty</em>
<a class="jxr_linenumber" name="328" href="#328">328</a> <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="329" href="#329">329</a>     <a href="../../../../org/jboss/netty/channel/ChannelHandler.html">ChannelHandler</a> removeLast();
<a class="jxr_linenumber" name="330" href="#330">330</a> 
<a class="jxr_linenumber" name="331" href="#331">331</a>     <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="332" href="#332">332</a> <em class="jxr_javadoccomment">     * Replaces the specified {@link ChannelHandler} with a new handler in</em>
<a class="jxr_linenumber" name="333" href="#333">333</a> <em class="jxr_javadoccomment">     * this pipeline.</em>
<a class="jxr_linenumber" name="334" href="#334">334</a> <em class="jxr_javadoccomment">     *</em>
<a class="jxr_linenumber" name="335" href="#335">335</a> <em class="jxr_javadoccomment">     * @throws NoSuchElementException</em>
<a class="jxr_linenumber" name="336" href="#336">336</a> <em class="jxr_javadoccomment">     *         if the specified old handler does not exist in this pipeline</em>
<a class="jxr_linenumber" name="337" href="#337">337</a> <em class="jxr_javadoccomment">     * @throws IllegalArgumentException</em>
<a class="jxr_linenumber" name="338" href="#338">338</a> <em class="jxr_javadoccomment">     *         if a handler with the specified new name already exists in this</em>
<a class="jxr_linenumber" name="339" href="#339">339</a> <em class="jxr_javadoccomment">     *         pipeline, except for the handler to be replaced</em>
<a class="jxr_linenumber" name="340" href="#340">340</a> <em class="jxr_javadoccomment">     * @throws NullPointerException</em>
<a class="jxr_linenumber" name="341" href="#341">341</a> <em class="jxr_javadoccomment">     *         if the specified old handler, new name, or new handler is</em>
<a class="jxr_linenumber" name="342" href="#342">342</a> <em class="jxr_javadoccomment">     *         {@code null}</em>
<a class="jxr_linenumber" name="343" href="#343">343</a> <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="344" href="#344">344</a>     <strong class="jxr_keyword">void</strong> replace(<a href="../../../../org/jboss/netty/channel/ChannelHandler.html">ChannelHandler</a> oldHandler, String newName, <a href="../../../../org/jboss/netty/channel/ChannelHandler.html">ChannelHandler</a> newHandler);
<a class="jxr_linenumber" name="345" href="#345">345</a> 
<a class="jxr_linenumber" name="346" href="#346">346</a>     <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="347" href="#347">347</a> <em class="jxr_javadoccomment">     * Replaces the {@link ChannelHandler} of the specified name with a new</em>
<a class="jxr_linenumber" name="348" href="#348">348</a> <em class="jxr_javadoccomment">     * handler in this pipeline.</em>
<a class="jxr_linenumber" name="349" href="#349">349</a> <em class="jxr_javadoccomment">     *</em>
<a class="jxr_linenumber" name="350" href="#350">350</a> <em class="jxr_javadoccomment">     * @return the removed handler</em>
<a class="jxr_linenumber" name="351" href="#351">351</a> <em class="jxr_javadoccomment">     *</em>
<a class="jxr_linenumber" name="352" href="#352">352</a> <em class="jxr_javadoccomment">     * @throws NoSuchElementException</em>
<a class="jxr_linenumber" name="353" href="#353">353</a> <em class="jxr_javadoccomment">     *         if the handler with the specified old name does not exist in this pipeline</em>
<a class="jxr_linenumber" name="354" href="#354">354</a> <em class="jxr_javadoccomment">     * @throws IllegalArgumentException</em>
<a class="jxr_linenumber" name="355" href="#355">355</a> <em class="jxr_javadoccomment">     *         if a handler with the specified new name already exists in this</em>
<a class="jxr_linenumber" name="356" href="#356">356</a> <em class="jxr_javadoccomment">     *         pipeline, except for the handler to be replaced</em>
<a class="jxr_linenumber" name="357" href="#357">357</a> <em class="jxr_javadoccomment">     * @throws NullPointerException</em>
<a class="jxr_linenumber" name="358" href="#358">358</a> <em class="jxr_javadoccomment">     *         if the specified old handler, new name, or new handler is</em>
<a class="jxr_linenumber" name="359" href="#359">359</a> <em class="jxr_javadoccomment">     *         {@code null}</em>
<a class="jxr_linenumber" name="360" href="#360">360</a> <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="361" href="#361">361</a>     <a href="../../../../org/jboss/netty/channel/ChannelHandler.html">ChannelHandler</a> replace(String oldName, String newName, <a href="../../../../org/jboss/netty/channel/ChannelHandler.html">ChannelHandler</a> newHandler);
<a class="jxr_linenumber" name="362" href="#362">362</a> 
<a class="jxr_linenumber" name="363" href="#363">363</a>     <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="364" href="#364">364</a> <em class="jxr_javadoccomment">     * Replaces the {@link ChannelHandler} of the specified type with a new</em>
<a class="jxr_linenumber" name="365" href="#365">365</a> <em class="jxr_javadoccomment">     * handler in this pipeline.</em>
<a class="jxr_linenumber" name="366" href="#366">366</a> <em class="jxr_javadoccomment">     *</em>
<a class="jxr_linenumber" name="367" href="#367">367</a> <em class="jxr_javadoccomment">     * @return the removed handler</em>
<a class="jxr_linenumber" name="368" href="#368">368</a> <em class="jxr_javadoccomment">     *</em>
<a class="jxr_linenumber" name="369" href="#369">369</a> <em class="jxr_javadoccomment">     * @throws NoSuchElementException</em>
<a class="jxr_linenumber" name="370" href="#370">370</a> <em class="jxr_javadoccomment">     *         if the handler of the specified old handler type does not exist</em>
<a class="jxr_linenumber" name="371" href="#371">371</a> <em class="jxr_javadoccomment">     *         in this pipeline</em>
<a class="jxr_linenumber" name="372" href="#372">372</a> <em class="jxr_javadoccomment">     * @throws IllegalArgumentException</em>
<a class="jxr_linenumber" name="373" href="#373">373</a> <em class="jxr_javadoccomment">     *         if a handler with the specified new name already exists in this</em>
<a class="jxr_linenumber" name="374" href="#374">374</a> <em class="jxr_javadoccomment">     *         pipeline, except for the handler to be replaced</em>
<a class="jxr_linenumber" name="375" href="#375">375</a> <em class="jxr_javadoccomment">     * @throws NullPointerException</em>
<a class="jxr_linenumber" name="376" href="#376">376</a> <em class="jxr_javadoccomment">     *         if the specified old handler, new name, or new handler is</em>
<a class="jxr_linenumber" name="377" href="#377">377</a> <em class="jxr_javadoccomment">     *         {@code null}</em>
<a class="jxr_linenumber" name="378" href="#378">378</a> <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="379" href="#379">379</a>     &lt;T <strong class="jxr_keyword">extends</strong> ChannelHandler&gt; T replace(Class&lt;T&gt; oldHandlerType, String newName, <a href="../../../../org/jboss/netty/channel/ChannelHandler.html">ChannelHandler</a> newHandler);
<a class="jxr_linenumber" name="380" href="#380">380</a> 
<a class="jxr_linenumber" name="381" href="#381">381</a>     <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="382" href="#382">382</a> <em class="jxr_javadoccomment">     * Returns the first {@link ChannelHandler} in this pipeline.</em>
<a class="jxr_linenumber" name="383" href="#383">383</a> <em class="jxr_javadoccomment">     *</em>
<a class="jxr_linenumber" name="384" href="#384">384</a> <em class="jxr_javadoccomment">     * @return the first handler.  {@code null} if this pipeline is empty.</em>
<a class="jxr_linenumber" name="385" href="#385">385</a> <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="386" href="#386">386</a>     <a href="../../../../org/jboss/netty/channel/ChannelHandler.html">ChannelHandler</a> getFirst();
<a class="jxr_linenumber" name="387" href="#387">387</a> 
<a class="jxr_linenumber" name="388" href="#388">388</a>     <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="389" href="#389">389</a> <em class="jxr_javadoccomment">     * Returns the last {@link ChannelHandler} in this pipeline.</em>
<a class="jxr_linenumber" name="390" href="#390">390</a> <em class="jxr_javadoccomment">     *</em>
<a class="jxr_linenumber" name="391" href="#391">391</a> <em class="jxr_javadoccomment">     * @return the last handler.  {@code null} if this pipeline is empty.</em>
<a class="jxr_linenumber" name="392" href="#392">392</a> <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="393" href="#393">393</a>     <a href="../../../../org/jboss/netty/channel/ChannelHandler.html">ChannelHandler</a> getLast();
<a class="jxr_linenumber" name="394" href="#394">394</a> 
<a class="jxr_linenumber" name="395" href="#395">395</a>     <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="396" href="#396">396</a> <em class="jxr_javadoccomment">     * Returns the {@link ChannelHandler} with the specified name in this</em>
<a class="jxr_linenumber" name="397" href="#397">397</a> <em class="jxr_javadoccomment">     * pipeline.</em>
<a class="jxr_linenumber" name="398" href="#398">398</a> <em class="jxr_javadoccomment">     *</em>
<a class="jxr_linenumber" name="399" href="#399">399</a> <em class="jxr_javadoccomment">     * @return the handler with the specified name.</em>
<a class="jxr_linenumber" name="400" href="#400">400</a> <em class="jxr_javadoccomment">     *         {@code null} if there's no such handler in this pipeline.</em>
<a class="jxr_linenumber" name="401" href="#401">401</a> <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="402" href="#402">402</a>     <a href="../../../../org/jboss/netty/channel/ChannelHandler.html">ChannelHandler</a> get(String name);
<a class="jxr_linenumber" name="403" href="#403">403</a> 
<a class="jxr_linenumber" name="404" href="#404">404</a>     <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="405" href="#405">405</a> <em class="jxr_javadoccomment">     * Returns the {@link ChannelHandler} of the specified type in this</em>
<a class="jxr_linenumber" name="406" href="#406">406</a> <em class="jxr_javadoccomment">     * pipeline.</em>
<a class="jxr_linenumber" name="407" href="#407">407</a> <em class="jxr_javadoccomment">     *</em>
<a class="jxr_linenumber" name="408" href="#408">408</a> <em class="jxr_javadoccomment">     * @return the handler of the specified handler type.</em>
<a class="jxr_linenumber" name="409" href="#409">409</a> <em class="jxr_javadoccomment">     *         {@code null} if there's no such handler in this pipeline.</em>
<a class="jxr_linenumber" name="410" href="#410">410</a> <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="411" href="#411">411</a>     &lt;T <strong class="jxr_keyword">extends</strong> ChannelHandler&gt; T get(Class&lt;T&gt; handlerType);
<a class="jxr_linenumber" name="412" href="#412">412</a> 
<a class="jxr_linenumber" name="413" href="#413">413</a>     <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="414" href="#414">414</a> <em class="jxr_javadoccomment">     * Returns the context object of the specified {@link ChannelHandler} in</em>
<a class="jxr_linenumber" name="415" href="#415">415</a> <em class="jxr_javadoccomment">     * this pipeline.</em>
<a class="jxr_linenumber" name="416" href="#416">416</a> <em class="jxr_javadoccomment">     *</em>
<a class="jxr_linenumber" name="417" href="#417">417</a> <em class="jxr_javadoccomment">     * @return the context object of the specified handler.</em>
<a class="jxr_linenumber" name="418" href="#418">418</a> <em class="jxr_javadoccomment">     *         {@code null} if there's no such handler in this pipeline.</em>
<a class="jxr_linenumber" name="419" href="#419">419</a> <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="420" href="#420">420</a>     <a href="../../../../org/jboss/netty/channel/ChannelHandlerContext.html">ChannelHandlerContext</a> getContext(<a href="../../../../org/jboss/netty/channel/ChannelHandler.html">ChannelHandler</a> handler);
<a class="jxr_linenumber" name="421" href="#421">421</a> 
<a class="jxr_linenumber" name="422" href="#422">422</a>     <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="423" href="#423">423</a> <em class="jxr_javadoccomment">     * Returns the context object of the {@link ChannelHandler} with the</em>
<a class="jxr_linenumber" name="424" href="#424">424</a> <em class="jxr_javadoccomment">     * specified name in this pipeline.</em>
<a class="jxr_linenumber" name="425" href="#425">425</a> <em class="jxr_javadoccomment">     *</em>
<a class="jxr_linenumber" name="426" href="#426">426</a> <em class="jxr_javadoccomment">     * @return the context object of the handler with the specified name.</em>
<a class="jxr_linenumber" name="427" href="#427">427</a> <em class="jxr_javadoccomment">     *         {@code null} if there's no such handler in this pipeline.</em>
<a class="jxr_linenumber" name="428" href="#428">428</a> <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="429" href="#429">429</a>     <a href="../../../../org/jboss/netty/channel/ChannelHandlerContext.html">ChannelHandlerContext</a> getContext(String name);
<a class="jxr_linenumber" name="430" href="#430">430</a> 
<a class="jxr_linenumber" name="431" href="#431">431</a>     <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="432" href="#432">432</a> <em class="jxr_javadoccomment">     * Returns the context object of the {@link ChannelHandler} of the</em>
<a class="jxr_linenumber" name="433" href="#433">433</a> <em class="jxr_javadoccomment">     * specified type in this pipeline.</em>
<a class="jxr_linenumber" name="434" href="#434">434</a> <em class="jxr_javadoccomment">     *</em>
<a class="jxr_linenumber" name="435" href="#435">435</a> <em class="jxr_javadoccomment">     * @return the context object of the handler of the specified type.</em>
<a class="jxr_linenumber" name="436" href="#436">436</a> <em class="jxr_javadoccomment">     *         {@code null} if there's no such handler in this pipeline.</em>
<a class="jxr_linenumber" name="437" href="#437">437</a> <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="438" href="#438">438</a>     <a href="../../../../org/jboss/netty/channel/ChannelHandlerContext.html">ChannelHandlerContext</a> getContext(Class&lt;? <strong class="jxr_keyword">extends</strong> ChannelHandler&gt; handlerType);
<a class="jxr_linenumber" name="439" href="#439">439</a> 
<a class="jxr_linenumber" name="440" href="#440">440</a>     <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="441" href="#441">441</a> <em class="jxr_javadoccomment">     * Sends the specified {@link ChannelEvent} to the first</em>
<a class="jxr_linenumber" name="442" href="#442">442</a> <em class="jxr_javadoccomment">     * {@link ChannelUpstreamHandler} in this pipeline.</em>
<a class="jxr_linenumber" name="443" href="#443">443</a> <em class="jxr_javadoccomment">     *</em>
<a class="jxr_linenumber" name="444" href="#444">444</a> <em class="jxr_javadoccomment">     * @throws NullPointerException</em>
<a class="jxr_linenumber" name="445" href="#445">445</a> <em class="jxr_javadoccomment">     *         if the specified event is {@code null}</em>
<a class="jxr_linenumber" name="446" href="#446">446</a> <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="447" href="#447">447</a>     <strong class="jxr_keyword">void</strong> sendUpstream(<a href="../../../../org/jboss/netty/channel/ChannelEvent.html">ChannelEvent</a> e);
<a class="jxr_linenumber" name="448" href="#448">448</a> 
<a class="jxr_linenumber" name="449" href="#449">449</a>     <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="450" href="#450">450</a> <em class="jxr_javadoccomment">     * Sends the specified {@link ChannelEvent} to the last</em>
<a class="jxr_linenumber" name="451" href="#451">451</a> <em class="jxr_javadoccomment">     * {@link ChannelDownstreamHandler} in this pipeline.</em>
<a class="jxr_linenumber" name="452" href="#452">452</a> <em class="jxr_javadoccomment">     *</em>
<a class="jxr_linenumber" name="453" href="#453">453</a> <em class="jxr_javadoccomment">     * @throws NullPointerException</em>
<a class="jxr_linenumber" name="454" href="#454">454</a> <em class="jxr_javadoccomment">     *         if the specified event is {@code null}</em>
<a class="jxr_linenumber" name="455" href="#455">455</a> <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="456" href="#456">456</a>     <strong class="jxr_keyword">void</strong> sendDownstream(<a href="../../../../org/jboss/netty/channel/ChannelEvent.html">ChannelEvent</a> e);
<a class="jxr_linenumber" name="457" href="#457">457</a> 
<a class="jxr_linenumber" name="458" href="#458">458</a>     <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="459" href="#459">459</a> <em class="jxr_javadoccomment">     * Schedules the specified task to be executed in the I/O thread associated</em>
<a class="jxr_linenumber" name="460" href="#460">460</a> <em class="jxr_javadoccomment">     * with this pipeline's {@link Channel}.</em>
<a class="jxr_linenumber" name="461" href="#461">461</a> <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="462" href="#462">462</a>     <a href="../../../../org/jboss/netty/channel/ChannelFuture.html">ChannelFuture</a> execute(Runnable task);
<a class="jxr_linenumber" name="463" href="#463">463</a> 
<a class="jxr_linenumber" name="464" href="#464">464</a>     <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="465" href="#465">465</a> <em class="jxr_javadoccomment">     * Returns the {@link Channel} that this pipeline is attached to.</em>
<a class="jxr_linenumber" name="466" href="#466">466</a> <em class="jxr_javadoccomment">     *</em>
<a class="jxr_linenumber" name="467" href="#467">467</a> <em class="jxr_javadoccomment">     * @return the channel. {@code null} if this pipeline is not attached yet.</em>
<a class="jxr_linenumber" name="468" href="#468">468</a> <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="469" href="#469">469</a>     <a href="../../../../org/jboss/netty/channel/Channel.html">Channel</a> getChannel();
<a class="jxr_linenumber" name="470" href="#470">470</a> 
<a class="jxr_linenumber" name="471" href="#471">471</a>     <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="472" href="#472">472</a> <em class="jxr_javadoccomment">     * Returns the {@link ChannelSink} that this pipeline is attached to.</em>
<a class="jxr_linenumber" name="473" href="#473">473</a> <em class="jxr_javadoccomment">     *</em>
<a class="jxr_linenumber" name="474" href="#474">474</a> <em class="jxr_javadoccomment">     * @return the sink. {@code null} if this pipeline is not attached yet.</em>
<a class="jxr_linenumber" name="475" href="#475">475</a> <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="476" href="#476">476</a>     <a href="../../../../org/jboss/netty/channel/ChannelSink.html">ChannelSink</a> getSink();
<a class="jxr_linenumber" name="477" href="#477">477</a> 
<a class="jxr_linenumber" name="478" href="#478">478</a>     <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="479" href="#479">479</a> <em class="jxr_javadoccomment">     * Attaches this pipeline to the specified {@link Channel} and</em>
<a class="jxr_linenumber" name="480" href="#480">480</a> <em class="jxr_javadoccomment">     * {@link ChannelSink}.  Once a pipeline is attached, it can't be detached</em>
<a class="jxr_linenumber" name="481" href="#481">481</a> <em class="jxr_javadoccomment">     * nor attached again.</em>
<a class="jxr_linenumber" name="482" href="#482">482</a> <em class="jxr_javadoccomment">     *</em>
<a class="jxr_linenumber" name="483" href="#483">483</a> <em class="jxr_javadoccomment">     * @throws IllegalStateException if this pipeline is attached already</em>
<a class="jxr_linenumber" name="484" href="#484">484</a> <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="485" href="#485">485</a>     <strong class="jxr_keyword">void</strong> attach(<a href="../../../../org/jboss/netty/channel/Channel.html">Channel</a> channel, <a href="../../../../org/jboss/netty/channel/ChannelSink.html">ChannelSink</a> sink);
<a class="jxr_linenumber" name="486" href="#486">486</a> 
<a class="jxr_linenumber" name="487" href="#487">487</a>     <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="488" href="#488">488</a> <em class="jxr_javadoccomment">     * Returns {@code true} if and only if this pipeline is attached to</em>
<a class="jxr_linenumber" name="489" href="#489">489</a> <em class="jxr_javadoccomment">     * a {@link Channel}.</em>
<a class="jxr_linenumber" name="490" href="#490">490</a> <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="491" href="#491">491</a>     <strong class="jxr_keyword">boolean</strong> isAttached();
<a class="jxr_linenumber" name="492" href="#492">492</a> 
<a class="jxr_linenumber" name="493" href="#493">493</a>     <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="494" href="#494">494</a> <em class="jxr_javadoccomment">     * Returns the {@link List} of the handler names.</em>
<a class="jxr_linenumber" name="495" href="#495">495</a> <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="496" href="#496">496</a>     List&lt;String&gt; getNames();
<a class="jxr_linenumber" name="497" href="#497">497</a> 
<a class="jxr_linenumber" name="498" href="#498">498</a>     <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="499" href="#499">499</a> <em class="jxr_javadoccomment">     * Converts this pipeline into an ordered {@link Map} whose keys are</em>
<a class="jxr_linenumber" name="500" href="#500">500</a> <em class="jxr_javadoccomment">     * handler names and whose values are handlers.</em>
<a class="jxr_linenumber" name="501" href="#501">501</a> <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="502" href="#502">502</a>     Map&lt;String, ChannelHandler&gt; toMap();
<a class="jxr_linenumber" name="503" href="#503">503</a> }
</pre>
<hr/><div id="footer">This page was automatically generated by <a href="http://maven.apache.org/">Maven</a></div></body>
</html>

